Side-slip weft detector



Dec. 18. 1928.

K. J. uNwlN SIDE SLIP WEFT DETECTOR Filed Nov. 21, 1927 Patented Dec. 18, 1928.

UNITED s'riyrEs` PATENT oFFlcE.

KENNETHJ. UNWIN, OF WORCESTER, VMASSACHUSETTSy ASSIGNOR TO CROMPTON & KNOWLES LOOM WORKS, 0F WORCESTER, MASSACHUSETTS. A CORPORATION OF MASSACHUSETTS.

SIDE-SLIP WEFT DETECTOR.

Application flied November 21, 1927. serial No. 234,585.

This invention relates to improvements in In eo-pending application Serial No. 200.,-

481 filed by Payne there is shown a detectorL having side slipping yarn engaging members pivotedk to a slide which is guided in a support. The forwardly projecting end of the detector element extends throrghv one side of the casingto engage the controller. 1 It is an important object oit my present invention to-keep the forwardly extendingend of the detector entirely` withinl the casing),- and to project a portion of the controller into said casing where it may he engaged by the detecting member at sulxtantial weit.

exhaustion.

The detector member and sliding carrier .therefor in the aforesaid application are held yieldingly in rear positionby a compression spring received by complementarily scmicircular grooves formed in the top and bottom, respectively, of the casing. This compression spring is hindered in its `free movements by contact with `said grooves and there is occasionally some inconvenience in assembling such a construction. It is therefore a furtherv object of my invention to simplify the method of applying the yielding force to the detector vto hold the same in normal yarn engaging position.

It is a still further object of my present invention to extend the forwardly projectvide the samelwith a plurality of notches located at different distances from the pivot of the detector' member so that a variety of tensions may be provided to enable the detector to effectively cooperate with yarns of different characteristics.

With these and other objects in view which will appear as the description proceeds, my invention resides in the combination and arrangement of parts hereinafter described and set forth in the claims.

In the accompanying drawings wherein one form of my invention is shown,

Fig. 1v is a top plan view of a detector made according to my present invention showing the same in engagement with a full mg end of the detector memberand to pro-V supply of weft,`certain parts being in section, y

Fig. 2 vis a vertical section on line 2-2 of Fig. 1,

Fig. 8 is a vertical section on line 3-3 of Fig. 1, and

Fig. 4 is a view similar to Fig. 1 but showing the detector in contact with an insufii-` cient supply of weft and moved to indvicat'n ing position.- s j Referring to the drawings the stationary standV 1() has a. vertical slot 11 therein which reciprocates an actuator lever 12operatively connected to weft replenishing `mechanism not shown but of substantially the same form as setforth in patent to Ryon No'. 1,030,748.

Saidlever isgiven a downward movement on each detecting `beat of the loom and when such movement is interrupted a changeV in the operation of the loom is initiated.

Said stand. has a platform 13 which supportstlie casing inwhich the detecting elements ,are mounted, said casing including a base or bed 14 and a cap 15. Said base is provided with a longitudinal groove 16 into which a portionl. of the cap extends to cause said cap and base to registerwith each other. The casing members are also provided with an aligning slot 18 through which extends a securing bolt 19 adjustably anchored'to the platform 18 through slot 18 in the latter.

A sliding carrier 2O is mounted in the slot 16 and has an upwardly projecting arm 21 located to be engaged by some part of the transferrer mechanism T at the time of transfer to move said slide 2O forwardly.

A weftdetector 22 'having a roughened sur- Y face 23 is mounted on a stud 24 projecting upwardly from the slide 2O and has detect'- ing engagement with bobbin B in shuttle S.

A controller 25 is pivoted to a stud 26 carried'by the bed 14 and has an upwardly projecting arm 27 normally lin the position shown in full lines in Figs. `1 and 3 so as to be out of the path of the actuator lever 12 Said controller is provided with a counter-weight 28 which holds the controller normally in the position shown in Fig. k3. The casing and the matter thus far de? scribed as being associated ltherewith may be 1 substantially the same as set forth in the aforesaid patent application and forms no part of my present invention.

In carrying` my improvements into eil'ect I provide the controller with a finger l0 which projects through a small slot al in the lett hand depending` wall l2 oi the cap l5 and I further provide the detector meinber 22 with a `forwardly projecting` arm 43 having a left hand edge L,lil for engagement with the right end of the linger Ll0 at the time of indication oi weft exhaustion only. The slide struck upwardly therefrom a lug i5 which limits movement ot the detector 22 around the stud 2li in a counterclockwise direction. The forward end i6 oil the arm d?) is bent upwardly slightly as indiv cated in Fig. 2 and is provided with a plurality of notches l? eac-h of which is proportioned to receive the forward end of a tension spring i8 the rear end ot which is supported by a lugor stud e9 extending upwardly from the base lll.

Under normal. conditions when suliicient yarn is present the detector will be moved forwardly without angular movement beine; heid against the lug` l5 by the spring` i8 and under these conditions the lett edge la et said detector willrmove past and clear oi1 the finger Ll0 without movingthe latter. I,Vlien insullicient wett is present, however, the detector swings about the stud 24C in a c clwise direction to assume a position similar to that shown in F ll, slide 2O un'- dcr these conditions remaining substantially at and the controller 25 being,I moved from the full to the dotted line position shown in Fing. 3 to interrupt downward movement of the actuator lever l2 and there by `aitiate a change in the operation of the loom. At the time oi transfer the arm 2l is eneaged by a part ot the tiansierrer mechanism T and the slide 2O and detector member 22 will be moved iiorwardly so that the latter will be out of the path oi' the incoming' bobbin.

From the foregoing it will be seen that I have provided ahollow casing` which is closed substantially on all sides and that the controller linger Ll0 projects through the wall oi the cap to be moved bythe arm 43 of the detector. It will further be seen that a tension spring is employed to hold both the detector ant slide yieldingly in rear position, a spring` of this uype beingless hampered by contact with other parts and more readily assembled than is the case ot a compressionspring. It will furthermore be seen that the extreme forward end of the l detector member is provided with a series of notches which atlord means tor varying the pressure transmitted to the yarn by spring 48.

Having thus described my invention it will be seen that changes and m'oditications may bevmade therein by those skilled in the artwithout departing trom the spirit and scope of the invention and I do not wish to be limited to the details herein disclosed, but what I claim is:

l. In wett detecting' mechanism a substantially closed casing in `which is slidably mounted a detector carrier, a side slipping wett detector pivotally supported by the slide, cooperating means formed on the detector and slide to limit angular movement of the detector with respect to the slide in one direction, an arm integral with the detector and extending forwardly and located within the casing, said arm being provided with a plurality of notches which are at different distances from the center of rotation of said detector, and a tension sp1-inn` located within the casing and having one end fast with respect to the casing` and havingthe other end held by one of the notches.

2. In wett detecting` mechanism a substantially closed casing,` in which is slidably mounted a detector carrier, a side slipping' weft detector means deliningra pivotal connection between the detector and the slide, a portion ot the detector resting` directly on the slide and deriving` its support therefrom, an arm formed integrally with the detector extending forwardly from the pivotal connection and bent upwardly to lie above the slide, Stop means between the slide and the detector to limit angular movement of the latter in one direction, and a tension spring, having one end fast with respect to the casing and having one end extending over the slide and connected to the upwardly bent end of the aforesaid arm, said spring holdingthe detector in normal position relatively to the slide and yieldingl when the slide and detector move forwardly while detecting' a suicient supply of wett.

In testimony whereoic I have hereunto atfixed my signature.

KENNETH a. Unwin. 

